SENSOR:- HLMS- Lights are reduced to an energy saving minimum dim level after expiration of occupancy time delay.- DMS- Lights will be switched back on if light level falls below set-point.- DMSM- When daylight contribution decreases, lights will be first switched back on at full dim and then raised up as necessary.- DMSN- During unoccupied periods without sufficient daylight lights are dropped to low dim setting, insuring minimum light levels are maintained at night.